Device for regulating delivery of plastic substances.



J. J. & 'I'. E. PEARON. DEVICE FOR RBGULATING DELIVERY 0F PLASTIC SUBSTANGBS.

APPLICATION FILED APR. B, 1909.

PatentedfMay 31, 1910.

"Illi-v i tubular UNITED STATES PATENT OFFICE.

ImS J'. FEABON AND THOMAS E. FEARON,

0F PHILADELPHIA, PENNSYLVANIA,

ASSIGNCRS, BY MESNE ASSIGNMENTS, TO THE BANDING MACHINE COMPNY, 0F

WILMINGTON, DELAWARE, CORPORATION .OI DELAWARE.

DEVICE FOR REGULATING DELIVERY OF PLASTIC SUBSTANCES.

Specification of Letters Patent.

Patented May .31, 1910.

To all whom, 'it may concern:

Be it known that we, JAMES J. FEARON and THOMAS E. FEARON, both citizens of the United States, residing in Philadelphia, Pennsylvania, provements in Devices forRegulating Delivery of Plastic Substances, of which the following is a specification.

Our invention relates to devices employed for delivering either continuously or intermittently limlted and regulated quantities of plastic material, such as paste or other adhesive substance, lubricating greases, cake batter, dough, or the like, the object of our invention being to so'construct such a device as to positively and accurately regulate the amount of delivery, to` revent leaka e between successive deliverles, and to malntain the material in a moist or soft condition for relatively long periods of time when no deliveries are belng made. This object we attain in the manner hereinafter set forth, reference being had to 'the accompanying drawing, in which- Figure l is a view, partly in elevation and partly in vertical section, of a device constructed in accordance with our invention, for delivering plastic material; Fig. '2 is a front view of part of the device with the delivery nozzle in section; and Fig. 3 is a plan or toprview of the device.

In Fig. 1 of the main receptacle for the plastic `material, which for convenience we will term paste, this receptacle, inclined at its lower end so as to form apro- Jecting inclined spout 2, which terminates 1n a nozzle 3 of contracted diameter, having va delivery opening a in the bottom of the' samen Fittin receptac e l 1s a plunger 4 with leather washer 4a, said plunger bein normally depressed by means oi a coil spring 5 surrounding the stem 6 ofthe ,plunger and contained within a cap 7 applied to the u per end of the receptacle l, the outer en of this cap having a tubular screw plug 9 which bears upon the upper end of the spring 5, whereby adjustment of the plug in, respect to the cap determines the tension of the spring.

The plunger stem 6 passes through the plug 9 and lis threaded at its upper have invented certain Im.

drawing, l represents the in the present instance, beingA snugly to the main portion of the `bevel wheel end for the reception of a nut 10. As the spring 5 expands its ower correspondingly decreases, and, in ordbr to prevent the expansion lof the spring to such an extent that the plunger will not apply su'icient force to the paste in the receptacle 1, 'the forward movement of the plunger is arrested at intervals by contact `of the nut 10 with the top yof the lug 9, readjustment of the plug being then e ected in order to increase the tension of the spring.

The axis of the delivery nozzle 3 is parallel with that ofthe rece tacle l1, the axis of :the delivery mouth of vtige nozzle is parallel with that 4of the nozzle itself and the nozzle Eis connected to the receptacle by 4means of an vinclined neck so that there is but little, if any, obstruction to the flow of the material from fthe receptacle lto the nozzle, conse quently the pressure Vupon the material in 'the nozzle is not aii'ected by any sharp changes in the direction of flow of the material fromthe receptacle to the outlet. As the plunger 4 exerts a constant pressure upon the mass of paste in the receptacle u vl, means are employed to regulate the vol- `urne of the stream delivered from the nozzle,

when the same is continuous, or prevent Ithe ejection of the paste from the nozzle in a4 continuous stream when an intermittent-discharge =is desired. VThese objects are lattained yb providing .the-nozzle with a feed screw -1' of relatively coarse yitch and ting snugly to the :interior of t e nozzle, feed screw -beinfr secured togor p of a stem 12 which passes through abus :upperend a bevel yWheel 14 whose'lmh israforming A ies' 1n the top of thespout 2 and carries y`its Atatab'ly mounted in a. bearing, bloei-r "l5 which rests upon said spout, .embraces receptacle and is split and provid-ed with a clamping screw 16, as shown in '3, so as to secure it 'firmly position the re ospita-ele.,

The bevel wheel meshes a simil-.ar if? upon a shaft i9, which is adapted to suitable bearings-on the block :tra continuous discharge the past-e iti-de# sired any suitable means may :be employed for rotatinfr this sha-ft 19 at predeten mined speed, but, in the present instance, an

intermittent discharge is provided for, the shaft 19 being equipped at its outer end with a ratchet wheel 2'0 engaged by a swinging pawl 2l pivotally mounted upon an arm 22 which is free to swing upon the shaft 19.

'Ihe feed screw 1l offers sufficient frictional resistance to prevent any direct flow of the paste through the nozzle 8 under the. pressure to which said paste is subjected by the plunger 4l, consequently, if the feed screw is continuously rotated, there will be continuous delivery of the paste from the nozzle 3, in quantity determined by the speed of rotation of the feed screw, or, if the feed screw is intermittently actuated, there will be corresponding intermittent deliveries of paste from the nozzle, the volume of each delivery being dependent upon the extent of partial rotary movement of the feed screw and the periods of deliver being timed to accord with the periods of movement of the feed screw, hence the latter can be readily governed by the intermittent movements of the arm 22 and the volume of each delivery can be governed by the extent of each of such movements.

We find it advisable to bevel the opening of the nozzle 3 so that it flares outwardly, as shown in Fig. 2, an opening of this form providing for the delivery of the paste in a straight line and without any tendency to curl. It is also advisable to terminate the feed screw ll some distance short of the bottom of the nozzle, in order that a body of paste may intervene between the bottom of the feed screw and the outlet opening w, as this construction insures greater certainty in the delivery of the material than is possiblel when the feed screw contacts with the bottom of the nozzle.

The rece tacle being practically air-tight, there will e no drying or hardening of the material contained therein, even if the delivery mechanism is not operated for a compara-tively long time, the onl portion of the material exposed to the air belng at the delivery openmg and if this exposed portion becomes dry or hard the removal of a ver small portion of the material at the out et will be sutlicient to render the device again operative.

When the material is plastic, the pressure of the plunger thereon is suiiicient to feed a constant supply of said material to the feed screw, but not sufficient to overcome the frictional resistance of said feed screw, and thus cause delivery of the material from the nozzle, consequently such delivery will be dependent upon the movement of the feed screw alone, and can thereby be accurately regulated or rendered intermittent as desired. In this respect our invention differs essentially from devices in which the plunger is actuated either continuously or intermittently by means of a feed screw, for, in

such devices, accurate delivery, or delivery of small quantities at a time is practically as the pressure upon the mass overcomes the frictional resistance to its movement, and continues until the frictional resistance again predominates, and a barely perceptible movement of the relatively large plunger will cause delivery of an excessive amount of material at the contracted nozzle. Both of these objections are overcome by locating the regulating device at the nozzle.

l/Ve claim l. In a device of the character described, the combination of a receptacle having a contracted delivery nozzle whose axis is parallel with that of the receptacle, an inclined neclr connecting the delivery nozzle and receptacle, means for maintaining the material under pressure in the nozzle, and a rotatable feed regulating device located in said nozzle.

2. In a device of the character described, the combination of a receptacle having a contracted delivery nozzle, whose axis is parallel with that of the receptacle, said nozzle having an outlet whose axis is coincident with that of the nozzle, an inclined neel; connecting the nozzle and the receptacle, means for maintaining the material under pressure in the nozzle, and a rotatable feed regulating device located in the nozzle.

3. In a device of the character described, a receptaclehaving an inclosed delivery nozzle, means for maintaining the material under pressure in said nozzle, and means contained in said nozzle for regulating delivery therefrom, said means having, as an element, a spiral flange which prevents direct How through the nozzle.

4. In a device of the character described, a receptacle having an inclosed delivery nozzle, means for maintaining the material under pressure in said nozzle, and a feed screw contained in said nozzle and serving to regulate the delivery therefrom, said feed screw preventing direct flow through the nozzle.

5. In a device of the character described, the combination of a receptacle having an inclosed delivery nozzle, means for maintaining the material under pressure in said nozzle, and movable delivery means in said nozzle which prevents direct lflow therethrough, and, when quiescent, presents such frictional resistance to the flow of the material under pressure as to prevent delivery of the same.

6. In a device of the character described, a receptacle having an inclosed delivery nozzle, means for maintaining the material under pressure in said nozzle, a feed screw combined with said nozzle, and preventing direct How through the same, and means for operating said feed screw.

7. In a device of the character described, a receptacle having an inclosed delivery noz'- zle, means for mamtaining the materia-l unimpossible, since the delivery begins as soon i der pressure in said nozzle, a feed screw combined with said nozzle, andl preventing direct low therethrough, and means for intermittently operating said feed screw.

8. In a device of the character described, a receptacle having an inclosed delivery nozzle, means' for maintaining the material under pressure in said nozzle, and a -feed screw contained in Said nozzle and preventing direct flow therethrough, said feed screw terminating short of the delivery end of the nozzle.

9. In a device of the character described, the combination of a receptacle having an offset or delivery spout with delivery nozzle thereon, having itsV axis parallel with that of the receptacle., means for maintaining the material under pressure in said nozzle, and al feed screw for governing the delivery from said nozzle, the stem of said feed screw passing through the top of the deflected s out.

p10. In a device of the character described, the combination of a receptacle having a delivery nozzle, means for governing the delivery from said nozzle, mechanism. for operating said delivery means, and a block detachably mounted upon the receptacle and carrying said operating mechanism.

ll. In a device of the character described, the combination of a receptacle having a delivery nozzle whose axis is parallel with that of the receptacle, means contained in said nozzle for governing the delivery therefrom, a transverse shaft disposed at a right angle to the axis of the nozzle, gearing connecting said shaft with the delivery means,

and means for imparting intermittent lnovements of partial rotation to said shaft.

l2. In a device of the character described, the combination of a receptacle having an inclosed delivery nozzle, with outwardly flaring delivery opening, means for maintaining the material under pressure in said nozzle, and means contained in said nozzle for regulating delivery therefrom, said mea-ns having, as an element, a spiral flange which prevents direct flow through the nozzle. i

In testimony whereof, We have signed our names to this specification', in the presence of two subscribing witnesses.

JAMES J. FEARON. THOMAS E. FEARON. Witnesses:

HAMlLToN D. TURNER, KATE A. BEADLE. 

